Any nations' ability to affect other nations can be divided into two broad categories: hard power and soft power.
Hard power, such as military force or the threat of military force, economic sanctions (blocking trade, other money measures).
Soft Power, such as negotiation, arbitration through international organizations, the bully pulpit, or cultural pressure (common values).
For some reason I can't paste the URL here, but wikipedia has a page on this called "power in international relations" that should be able to bring you to some more research-paper-friendly sources.
Presidents can back up their foreign policy decisions with hard power. A good example of hard power is through the use of military force.
Chief of PartyHe's Democratic or Republican and makes decisions regarding the make-up of his individual political party.
Up to who? To when? Your question is incomplete.
That would be called the presidents cabinet. It's designed to help the president make political decisions and give him advice.
Because lots of presidents were born there! Search it up on Google!
big stick
scientists back up there statments with fact
was up
No former US presidents currently live in Wisconsin.
no.none of our presidents were born in oklohoma
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no 18 and up can vote